Implement mechanism to push & pop rendering attributes

Shader.cpp

@@ -203,11 +203,3 @@ void Shader::reset()
 }
 
 
-void Shader::setModelview(float x, float y, float angle, float scale, float aspect_ratio)
-{
-
-    glm::mat4 View = glm::translate(glm::identity<glm::mat4>(), glm::vec3(x, y, 0.f));
-    View = glm::rotate(View, angle, glm::vec3(0.0f, 0.0f, 1.0f));
-    glm::mat4 Model = glm::scale(glm::identity<glm::mat4>(), glm::vec3(scale * aspect_ratio, scale, scale));
-    modelview = View * Model;
-}